Computing-machine.



F. A; HART. GOMPUTING'MACHINE rrucmon H p JUNE 28. I911. RENEWED IPatented Jan. 16, 191.7.

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BY E I mm WITNESSES: Q 4

F. A. HART. L COMPUTING MACHINE. APPLICATION FILED JUNE 28, I911.RENEWED JAN. 21.1913.

Pzipented Jan. 16,1917.

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m AT TOR F, A.,.HART. I COMPUTING mcumg APPLICATION FILED JUNE 2B. (911-RENEWEQ JAN: 21 9135 1,212,895.- Patented Jan. 16,1917.

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5r" WITNESSES:

mvturom yam 4M @4442 ATT'on u Y UNITED STATES PATENT OFFICE.

'FREDEBICK A. HAR'1, OF JERSEY CITY,"NEW JERSEY, ASSIGNOR, BY MESNEASSIGN- MENTS, TO UNDEBWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N.Y., A

CORPORATION OF NEW YORK.

comru'rmo-macnmn.

Specification of Letters Patent.

Patented J an. 16, 1917.

Application filed June 28, 1911, Serial No. 685,762. Renewed January 21,1913. Serial No. 743,421.

To all whom it may concern Be it known that I, 'FREDERIOK A. HAnT,

a citizen of the United States, residing in Jersey-City, in the countyof Hudson and State of New-Jersey, haveinvented certain new and usefulImprovements in Computing-Machines, of which the following is aspecification.

This invention relates to computing machines of the class inwhichnumeral keysare depressed to set pins orthe like, and in which a generaloperator is afterward actuated to drive the dial wheels or other devicesto various extents as determined by the keys depressed. In suchmachines, the general operator has been actuated manually by means of ahandle: and means have been provided for insuring that the operatorshall give said handle a full stroke in each direction, such meansconsisting of a pawl-andratchet' mechanism, usually compris ng twopawls, one being inefiective, and the other 7 effective upon one strokeof the handle, and the converse being true upon the return stroke of thehandle. The general operator has also in some cases been operated bymeans of, an electric motor or other source of power; and in such a casethe pawl-andratchet mechanism for insuring full stroke of the generaloperator, is not required or desired.

In the drawings is'disclosed which is providedwith. both a motor driveand a hand drive for the general operator, either of which can be usedwhen desired, to the exclusion of the other; the motor gearing beingshiftable out of connection with the general operator.

According to the present invention, the pawl-and-ratchet mechanism orequivalent full-stroke deviw is brought intouse when the motor gearingis thrown out, and said full-stroke device is thrown out when the motormechanismis brought into use.

The invention is shown in connection with a combined computing andtypewriting machine of the Underwood-Hanson type, such as shown andreferred to in my application No. 596,451, filed December 9, 1910. The

full-stroke device comprising the invention,

and applied to such machines, embodies a ratchet-wheel or segment and apair of pawls' which are alternatelythrown into and out of action. Iconnect to the hinged frame on the same in effective position.

a machine,

which the motor-driven gearing is mounted,

and by which it is shifted out of use, a device for rendering both ofsaid pawls ineffective when the motor frame is swung to bring the motorgearing into use, and for restoring to said pawls their normal functionswhen the motor or its gearing is thrown out. motor-driven gearingthereon and appurtenant structure, are broadly claimed in my pendingapplication No. 130,961, filed November 13, 1916, as a division of saidapplication 596,451.

In the accompanying drawings, Figure 1 is a sectional side elevation ofa combined typewriting and computing machine of the type aforesaid,showing the motor in use,

Said hinged frame with the and the full-stroke mechanism as ineffective.

Fig. 2 is a'sectional front elevation, showing the motor'connection asdropped to a position of disuse. Fig. 3 is a perspective view of thefull-stroke mechanism, showing Fig. 4 is a sectional plan of thefull-stroke mechanism. Fig. 5 is a sectional side elevation of thefullstroke mechanism in effective position. Fig. 6 is a part sectionalfront elevation of the full-stroke mechanism. Fig. 7 is a plan of thesame. Fig. 8 is a side elevation, show ing the full-stroke mechanism asineffective.

The typewriting and computing mechanism includes keys having stems 1 tooperate linkages 2 to set or project pins 3 upon bars 4, which aremovable forwardly and carry racks 5 to mesh with pinions 6 upon dialwheels 7. The paper carriage of the typewriter operatesieuccessivelylinks 8, conhandle 11 is grasped by the operator and pulled forward, andthen returned, said handle being provided upon a crank 12. The crank isfixed upon a rock shaft 13, upon the ends of which are fixed segmentalgears 14 to mesh with idle pinions 15, the

latter meshing with racks 16, mounted to slide forwardly and rearwardlyat the sidesof the base 17 of the adding mechanism;

said racks connected by a cross bar 18, which during its forward strokeengages the depressed pins 3, and drives all the racks 5 to turn all thedial wheels accordingly; an

pawl 22 being effective during the backstroke of the general operator,to prevent forward movement thereof before said back stroke iscompleted. a

The alternate engagement and disengagement of these pawls is effected bymeans of tappets 23, 24, in the form of studs projecting from segment 14or ratchet 20. At the final portion of the forwardstroke of the generaloperator, the tappet 23 strikes a screw stop 25 fixed upon one arm 26 ofa three-armed lever pivoted loosely uponthe rock shaft 13, and swingssaid lever to raise "another arm 27 thereof, thereby lifting a pin orwrist 28 provided uponthe pawl 21, to raise said pawlclear of theratchet.

The depression-of arm 26, occasioned by the engagement of the .tappet 23with the.

screw stop 25, permits the drop of pawl 22 'intoengagement with theratchet 20, said pawl having a stud ,29 which is shown at Fig. 5 restingon said arm 26, to be thrown out or rendered ineffective thereby duringthe forwardstroke of the general operator. The screw stop 25 is so set,that the pawl 21 is thrown out practically at the instant of thecompletion of the forward stroke of the general operator.

At the completion of the return stroke of the general operator, thetappet 24 strikes a screw stop 30, thereby swinging the lever 26, 27 inthe opposite direction, so that the pawl 21 is'let into mesh, and pawl22 is raised out of mesh, as seen at Fig. 5. Said lever has'adownwardly-extending arm 31 provided with notches 32, 33 in its lowerend, to be engaged by a spring detent 34 to hold-the lever in eitherposltion; and a finger piece 35 is provided upon the lever to raiseeither pawl if desire r In addition to the handle 11, there is provideda motor 37 for reciprocating the general operator when desired. Theshaft 38 I of this motor has a worm 39 to mesh with a gear 40 that isconnected by a clutch mechanism 41 wit-ha shaft 42, the latter having acrank 43 provided at its end with a swiveled block 44,'fit ted to slidein an arm 45 pro- 'videdupon a head 46, the latter having a neck 47fitting'in a yoke 48 secured upon one of the sliding racks 16 of thegeneral operator.

By depressing a key 49, a lever 50 is vibrated to actuate a pin 51,which controls the clutch mechanism 41; and upon one complete revolutionof the shaft 42, the clutch mechanism is restored to normal idleposition,as set forth in said application.

The gear or worm wheel 40, head 46 and intermediate parts are mounted ina frame 52, which has a hub 53 by which it is hinged loosely upon theshaft 38 of the motor, so that it can be swung from the raised effectiveposition at Fig. 1, to the dropped ineffective position at Fig. 2; ahandle 54, connected to a lever 55, being provided for raising andlowering said frame 52, as explained in said application.

When the gear frame 52 isdropped, and the handle 11 is employed forreciprocating the general operator, the pawls 21 and 22 are effective inalternation, as above set forth; but I provide means in connection withthe gear frame 52 for throwing out said pawls whenever said gear frameis lifted from the idle position at Fig. 2 to the effective position atFig. 1.

Upon the end of the gear frame is provided a projecting finger 56,which, at the elevation of said gear frame, engages a finger 57 formedupon the lower end of a vertical link or bar 58, which at its upper endis pivoted at 59 to the end of a lever 6O, the latter fulcrumedat 61upon the base 17 'of the adding machine, and havin lugs 62,

- bar 58 may have a shoulder'66 to rest upon.

' one of two pins 67, by which it is guided.

When the gear frame 52 is swung down to the Fig. 2 position, the members58, 60

drop of their own weight to idle positions,

thus freeing the pawls 21, 22, so that they may resume their functions.

Variationsmay be resorted to within the scope of the invention, andportions of the improvements may be used without others. I Having thusdescribed my invention, I claim:

1. In a machine of the character specified, the combination, with adriving part; of a device for manually operating said driving part, amotor for automatically operating said driving part; a full-strokedevice associated with said driving part and effective at the operationof said manual device; con:

trolling means for alternatively connecting or-disconnecting said motorwith or from said driving part; and means operatedautomatically,lconsequent upon the connection.

of the motor, for rendering said full-stroke device inefi'ective. V

2. In a machine of the character specified, the combination, with adriving part; of a device for manually operating said operate said pawlsin alternation during the driving part; a motor for automaticallyoperating said driving part; 'a full-stroke device associated with saiddriving part and comprising pawland -ratchet mechanism, said full-strokedevice effective at the operation of said manual device; controllingmeans for alternatively connecting or disconnecting said motor with orfrom said driving part; and means operated consequent upon theconnection of' the motor, for preventing engagement between thecomponent members of said pawl-and-ratchet device, to render saidfull-stroke ineffective.

3. In a machine of the character specified,

the combination, with a driving part; of

adevice for manually operating said driving part; a motor forautomatically operating said driving part;v a full-stroke deviceassociated with sald driving part, and effective at the operation ofsaid manual device; gearing driven by said motor and adapted forconnection with said driving part, to actuate the same; a frame carryingsaid gearing movable into and out of position to effect such connection;and means operated by said frame at its connecting movement, forrendering said full-stroke device ineffective.

4. In'a machine of the character specified, the combination, with adriving part; of a device for manually operating said driving partcomprising a shaft, and a handle therefor; and a full-stroke deviceassociated with said driving part and comprising a ratchet secured tosaid shaft, a pair of oppositely-facing pawls capable of alternatelyengaging said ratchet, and a lever mounted on said shaft and providedwith a pair of arms to engage and operate said pawls in alternationduring the rotation of said shaft by said handle.

5. In a machine'of the character specified, the combination, with adriving part; of a device for manually operating said driving pa rtcomprising a shaft, and a handle therefor; and a full-stroke deviceassociated with said driving part and comprising a toothed,reciprocating member secured to said shaft, a pair of pawls cooperatingwith said member, one in each direction of movement thereof, and acontroller pivoted on said shaft for operation thereby and acting tooperation of said manuahdevice.

6. In a machine of the character specified, the combination, with adriving part; of a device for manually operating said driving part,comprising a shaft, and a handle therefor; and a full-stroke deviceassociated with said driving part and comprising a ratchet secured tosaid shaft, a pairof op+ positely-facing pawls engageable with saidratchet, and a controller mounted on said shaft for operation by thesame, but having lost motion with relation thereto, said controllerprovided with a pair of oppositely-projecting arms arranged to engageand operate said pawls in alternation durcomprising a ratchet secured tosaid shaft,

a pair of oppositely-facing pawls engageable wlth said ratchet, and acontroller for operating said pawls in alternation loosely mounted onsaid shaft, said ratchet having a pair of promotions thereon arranged toengage said controller in alternation during the opposite movements ofthe ratchet, to rock the same alternately in opposite directions.

8. In a machine of the character specified, the combination, with adriving part; of a device for manually operating said driving part,comprising a reciprocatory shaft, and a handle therefor; and afull-stroke deviceassoclated with said driving part and comprising aratchet secured to said shaft, a pa1'r of oppositely-facing pawlsengageable with said ratchet, and a two-armed controller for operatingsaid pawls in alternation loosely mounted on said shaft; each arm of thecontroller having a shifting member thereon, and said ratchet having apair of PI'OJGCtiOIlS arranged to engage said shiftlng members inalternation during the movements of the ratchet, to rock said controlleralternately in opposite directions; said shifting members beingadjustable to vary the relatlve timing of their engagement by saidprojections.

9. In a machine of the character specified, the combination, with adriving part; of a devlce for manually operating said drivng part; amotor for automatically operating said drivmg part; a full-stroke deviceassociated with said driving part, and eflectlve at the operation ofsaid manual device;

gearing driven by said motor and adapted for connection with saiddriving part, to

actuate the same; a carrier for said gear ing movable into and out ofposition to effect such connectlon; a lever for disabling saidfull-stroke device; and a pendent connected to operate said lever andarranged in the path of said carrier, to be" operated by the latterduring its connecting movement.

10. In a machine of the character specified, the combination, with adriving part; of a device for manually operating said .drivingpart; anda full-stroke device associated with said driving part and comprising aratchet, a pair of oppositely-fac ing pawls capable of alternatelyengaging said ratchet, a pivotally-mounted lever provided with a pair ofarms to engage and operate said pawls in alternation during the oeration of said manual device, said lever aving a pair of notches in oneend thereof, an

a spring-controlled device en- 'gageable with said notches inalternation;

1 1. In a machine of the character speci: fied, the combination, with adriving part; of a device for manually operating said driving part;a'fnll-stroke device a$ociated with said driving part and comprising aratchet, a pair of oppositely-facing pawls engageable with said ratchet,each pawl having a painof projections thereon, and a controller having apair of arms, each arm arranged to engage one of the projectionson theadjacent pawl, so as to operate said pawls in alternation; controllingmeans for alternately connecting or disconnecting said motor with-orfromsaid driving part; and a lever arranged to engage the other projectionson said pawls consequent upon the connection of the motor, for liftingboth pawls out of the sphere of action of said controller.

FREDERICK. A. HART.

Witnesses PAUL ZIRON, B. Gownmic.

